mirror of https://github.com/bitcoin/bitcoin
270 lines
10 KiB
C++
270 lines
10 KiB
C++
// Copyright (c) 2009-2022 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <core_io.h>
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#include <common/system.h>
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#include <consensus/amount.h>
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#include <consensus/consensus.h>
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#include <consensus/validation.h>
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#include <key_io.h>
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#include <script/descriptor.h>
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#include <script/script.h>
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#include <script/solver.h>
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#include <serialize.h>
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#include <streams.h>
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#include <undo.h>
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#include <univalue.h>
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#include <util/check.h>
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#include <util/strencodings.h>
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#include <map>
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#include <string>
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#include <vector>
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UniValue ValueFromAmount(const CAmount amount)
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{
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static_assert(COIN > 1);
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int64_t quotient = amount / COIN;
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int64_t remainder = amount % COIN;
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if (amount < 0) {
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quotient = -quotient;
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remainder = -remainder;
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}
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return UniValue(UniValue::VNUM,
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strprintf("%s%d.%08d", amount < 0 ? "-" : "", quotient, remainder));
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}
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std::string FormatScript(const CScript& script)
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{
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std::string ret;
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CScript::const_iterator it = script.begin();
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opcodetype op;
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while (it != script.end()) {
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CScript::const_iterator it2 = it;
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std::vector<unsigned char> vch;
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if (script.GetOp(it, op, vch)) {
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if (op == OP_0) {
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ret += "0 ";
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continue;
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} else if ((op >= OP_1 && op <= OP_16) || op == OP_1NEGATE) {
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ret += strprintf("%i ", op - OP_1NEGATE - 1);
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continue;
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} else if (op >= OP_NOP && op <= OP_NOP10) {
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std::string str(GetOpName(op));
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if (str.substr(0, 3) == std::string("OP_")) {
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ret += str.substr(3, std::string::npos) + " ";
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continue;
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}
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}
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if (vch.size() > 0) {
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ret += strprintf("0x%x 0x%x ", HexStr(std::vector<uint8_t>(it2, it - vch.size())),
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HexStr(std::vector<uint8_t>(it - vch.size(), it)));
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} else {
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ret += strprintf("0x%x ", HexStr(std::vector<uint8_t>(it2, it)));
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}
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continue;
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}
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ret += strprintf("0x%x ", HexStr(std::vector<uint8_t>(it2, script.end())));
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break;
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}
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return ret.substr(0, ret.empty() ? ret.npos : ret.size() - 1);
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}
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const std::map<unsigned char, std::string> mapSigHashTypes = {
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{static_cast<unsigned char>(SIGHASH_ALL), std::string("ALL")},
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{static_cast<unsigned char>(SIGHASH_ALL|SIGHASH_ANYONECANPAY), std::string("ALL|ANYONECANPAY")},
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{static_cast<unsigned char>(SIGHASH_NONE), std::string("NONE")},
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{static_cast<unsigned char>(SIGHASH_NONE|SIGHASH_ANYONECANPAY), std::string("NONE|ANYONECANPAY")},
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{static_cast<unsigned char>(SIGHASH_SINGLE), std::string("SINGLE")},
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{static_cast<unsigned char>(SIGHASH_SINGLE|SIGHASH_ANYONECANPAY), std::string("SINGLE|ANYONECANPAY")},
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};
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std::string SighashToStr(unsigned char sighash_type)
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{
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const auto& it = mapSigHashTypes.find(sighash_type);
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if (it == mapSigHashTypes.end()) return "";
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return it->second;
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}
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/**
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* Create the assembly string representation of a CScript object.
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* @param[in] script CScript object to convert into the asm string representation.
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* @param[in] fAttemptSighashDecode Whether to attempt to decode sighash types on data within the script that matches the format
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* of a signature. Only pass true for scripts you believe could contain signatures. For example,
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* pass false, or omit the this argument (defaults to false), for scriptPubKeys.
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*/
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std::string ScriptToAsmStr(const CScript& script, const bool fAttemptSighashDecode)
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{
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std::string str;
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opcodetype opcode;
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std::vector<unsigned char> vch;
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CScript::const_iterator pc = script.begin();
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while (pc < script.end()) {
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if (!str.empty()) {
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str += " ";
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}
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if (!script.GetOp(pc, opcode, vch)) {
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str += "[error]";
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return str;
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}
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if (0 <= opcode && opcode <= OP_PUSHDATA4) {
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if (vch.size() <= static_cast<std::vector<unsigned char>::size_type>(4)) {
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str += strprintf("%d", CScriptNum(vch, false).getint());
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} else {
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// the IsUnspendable check makes sure not to try to decode OP_RETURN data that may match the format of a signature
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if (fAttemptSighashDecode && !script.IsUnspendable()) {
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std::string strSigHashDecode;
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// goal: only attempt to decode a defined sighash type from data that looks like a signature within a scriptSig.
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// this won't decode correctly formatted public keys in Pubkey or Multisig scripts due to
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// the restrictions on the pubkey formats (see IsCompressedOrUncompressedPubKey) being incongruous with the
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// checks in CheckSignatureEncoding.
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if (CheckSignatureEncoding(vch, SCRIPT_VERIFY_STRICTENC, nullptr)) {
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const unsigned char chSigHashType = vch.back();
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const auto it = mapSigHashTypes.find(chSigHashType);
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if (it != mapSigHashTypes.end()) {
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strSigHashDecode = "[" + it->second + "]";
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vch.pop_back(); // remove the sighash type byte. it will be replaced by the decode.
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}
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}
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str += HexStr(vch) + strSigHashDecode;
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} else {
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str += HexStr(vch);
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}
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}
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} else {
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str += GetOpName(opcode);
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}
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}
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return str;
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}
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std::string EncodeHexTx(const CTransaction& tx)
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{
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DataStream ssTx;
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ssTx << TX_WITH_WITNESS(tx);
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return HexStr(ssTx);
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}
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void ScriptToUniv(const CScript& script, UniValue& out, bool include_hex, bool include_address, const SigningProvider* provider)
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{
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CTxDestination address;
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out.pushKV("asm", ScriptToAsmStr(script));
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if (include_address) {
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out.pushKV("desc", InferDescriptor(script, provider ? *provider : DUMMY_SIGNING_PROVIDER)->ToString());
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}
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if (include_hex) {
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out.pushKV("hex", HexStr(script));
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}
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std::vector<std::vector<unsigned char>> solns;
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const TxoutType type{Solver(script, solns)};
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if (include_address && ExtractDestination(script, address) && type != TxoutType::PUBKEY) {
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out.pushKV("address", EncodeDestination(address));
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}
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out.pushKV("type", GetTxnOutputType(type));
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}
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void TxToUniv(const CTransaction& tx, const uint256& block_hash, UniValue& entry, bool include_hex, const CTxUndo* txundo, TxVerbosity verbosity)
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{
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CHECK_NONFATAL(verbosity >= TxVerbosity::SHOW_DETAILS);
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entry.pushKV("txid", tx.GetHash().GetHex());
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entry.pushKV("hash", tx.GetWitnessHash().GetHex());
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// Transaction version is actually unsigned in consensus checks, just signed in memory,
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// so cast to unsigned before giving it to the user.
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entry.pushKV("version", static_cast<int64_t>(static_cast<uint32_t>(tx.nVersion)));
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entry.pushKV("size", tx.GetTotalSize());
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entry.pushKV("vsize", (GetTransactionWeight(tx) + WITNESS_SCALE_FACTOR - 1) / WITNESS_SCALE_FACTOR);
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entry.pushKV("weight", GetTransactionWeight(tx));
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entry.pushKV("locktime", (int64_t)tx.nLockTime);
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UniValue vin{UniValue::VARR};
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// If available, use Undo data to calculate the fee. Note that txundo == nullptr
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// for coinbase transactions and for transactions where undo data is unavailable.
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const bool have_undo = txundo != nullptr;
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CAmount amt_total_in = 0;
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CAmount amt_total_out = 0;
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for (unsigned int i = 0; i < tx.vin.size(); i++) {
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const CTxIn& txin = tx.vin[i];
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UniValue in(UniValue::VOBJ);
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if (tx.IsCoinBase()) {
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in.pushKV("coinbase", HexStr(txin.scriptSig));
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} else {
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in.pushKV("txid", txin.prevout.hash.GetHex());
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in.pushKV("vout", (int64_t)txin.prevout.n);
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UniValue o(UniValue::VOBJ);
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o.pushKV("asm", ScriptToAsmStr(txin.scriptSig, true));
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o.pushKV("hex", HexStr(txin.scriptSig));
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in.pushKV("scriptSig", o);
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}
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if (!tx.vin[i].scriptWitness.IsNull()) {
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UniValue txinwitness(UniValue::VARR);
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for (const auto& item : tx.vin[i].scriptWitness.stack) {
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txinwitness.push_back(HexStr(item));
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}
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in.pushKV("txinwitness", txinwitness);
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}
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if (have_undo) {
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const Coin& prev_coin = txundo->vprevout[i];
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const CTxOut& prev_txout = prev_coin.out;
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amt_total_in += prev_txout.nValue;
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if (verbosity == TxVerbosity::SHOW_DETAILS_AND_PREVOUT) {
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UniValue o_script_pub_key(UniValue::VOBJ);
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ScriptToUniv(prev_txout.scriptPubKey, /*out=*/o_script_pub_key, /*include_hex=*/true, /*include_address=*/true);
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UniValue p(UniValue::VOBJ);
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p.pushKV("generated", bool(prev_coin.fCoinBase));
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p.pushKV("height", uint64_t(prev_coin.nHeight));
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p.pushKV("value", ValueFromAmount(prev_txout.nValue));
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p.pushKV("scriptPubKey", o_script_pub_key);
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in.pushKV("prevout", p);
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}
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}
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in.pushKV("sequence", (int64_t)txin.nSequence);
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vin.push_back(in);
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}
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entry.pushKV("vin", vin);
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UniValue vout(UniValue::VARR);
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for (unsigned int i = 0; i < tx.vout.size(); i++) {
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const CTxOut& txout = tx.vout[i];
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UniValue out(UniValue::VOBJ);
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out.pushKV("value", ValueFromAmount(txout.nValue));
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out.pushKV("n", (int64_t)i);
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UniValue o(UniValue::VOBJ);
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ScriptToUniv(txout.scriptPubKey, /*out=*/o, /*include_hex=*/true, /*include_address=*/true);
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out.pushKV("scriptPubKey", o);
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vout.push_back(out);
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if (have_undo) {
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amt_total_out += txout.nValue;
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}
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}
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entry.pushKV("vout", vout);
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if (have_undo) {
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const CAmount fee = amt_total_in - amt_total_out;
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CHECK_NONFATAL(MoneyRange(fee));
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entry.pushKV("fee", ValueFromAmount(fee));
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}
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if (!block_hash.IsNull()) {
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entry.pushKV("blockhash", block_hash.GetHex());
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}
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if (include_hex) {
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entry.pushKV("hex", EncodeHexTx(tx)); // The hex-encoded transaction. Used the name "hex" to be consistent with the verbose output of "getrawtransaction".
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}
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}
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